220 9636 <17f41a95-ec00-491b-8cb0-0df95c4067c8@isocpp.org> article Path: news.gmane.org!not-for-mail From: jgottman6@gmail.com Newsgroups: gmane.comp.lang.c++.isocpp.proposals Subject: Defect Report: No template aliases defined for new type traits Date: Wed, 5 Mar 2014 19:39:19 -0800 (PST) Lines: 63 Approved: news@gmane.org Message-ID: <17f41a95-ec00-491b-8cb0-0df95c4067c8@isocpp.org> Reply-To: std-proposals@isocpp.org NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_1292_7458619.1394077159725" X-Trace: ger.gmane.org 1394077153 20707 80.91.229.3 (6 Mar 2014 03:39:13 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Thu, 6 Mar 2014 03:39:13 +0000 (UTC) To: std-proposals@isocpp.org Original-X-From: std-proposals+bncBD7LHGWIQEPRB2G336MAKGQESPUMDUY@isocpp.org Thu Mar 06 04:39:22 2014 Return-path: Envelope-to: gclcip-std-proposals@m.gmane.org Original-Received: from mail-ve0-f198.google.com ([209.85.128.198]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1WLP9W-0006jA-48 for gclcip-std-proposals@m.gmane.org; Thu, 06 Mar 2014 04:39:22 +0100 Original-Received: by mail-ve0-f198.google.com with SMTP id oz11sf5023610veb.5 for ; Wed, 05 Mar 2014 19:39:21 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=date:from:to:message-id:subject:mime-version:x-original-sender :reply-to:precedence:mailing-list:list-id:list-post:list-help :list-archive:list-subscribe:list-unsubscribe:content-type; bh=PLCWNpmSyFWVCkOiAfmnCC03UNwtIRi8lTS4qarVSyI=; b=WwW+lrLWnnBmoKdDFCx1viUwTi54T/aGp8lg7FTbaBCbtV8cBGKsPvFvo8T5A6uTcH r9Q4raBfUxuAb0oYjqABE2wAzxe+AsGDFBFPsC8Nl+ImJ8dT+sJ1HCBQv3wLJpT6w4Z/ fBxaVJ/Ox1sPBCIOPWqDk7eOf6CS5EVrU0Q0HwJPoF+bPhqg88ar0eL6eQj+U3WPgp26 HdwrKfw49r97Lmo3LfA6mWcasY2SWtNn6WQe71pDru3ri5AT+V3mHayYHZW1BxgLIN66 Ziin+YPbjoLAVrXDKn6t/0uQUloXcrXT8T5UECZwddMhLVWP6znElapelg47xKb7u7SV A6dw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20130820; h=x-gm-message-state:date:from:to:message-id:subject:mime-version :x-original-sender:reply-to:precedence:mailing-list:list-id :list-post:list-help:list-archive:list-subscribe:list-unsubscribe :content-type; bh=PLCWNpmSyFWVCkOiAfmnCC03UNwtIRi8lTS4qarVSyI=; b=bMoLsOuno06h9jOi1VGeYneyuAXBQvedl/LE/Y3t3CC6czF0RPmyFkCsfbQdNel9Uj La+YQcARaseKXDhkDKLdGkzSFYopMyYzvQJBA78UskqbvoABuAahsXad6ChOfFEywcYV GsC+zAr69FWj5lwc6QlK3Zb6IkgwAYnmf/4lyXnHnsSgJMhwEZjugrZzRMmUg9cin7os Adzx5DFmyY+z6XO09ZfGXbgEIwlyqLZjIPEjwvVuf0C+wa18HE4+uNCWwbFRWTKHgXp9 XYLcdXD/8m3PagBzKjqFq6oTu+1cVGcOnV7zCTvRT9oGeYt0ttM3rrYFuxNz7t87firP HsHg== X-Gm-Message-State: ALoCoQnhcy66gNzHiMsYTDA/R2OBRRLhKmn6gxc3vdQ1Ppd6Koln2MOo0Zfk2ydN69ID+Br00mLS X-Received: by 10.236.131.44 with SMTP id l32mr3547562yhi.27.1394077161142; Wed, 05 Mar 2014 19:39:21 -0800 (PST) X-BeenThere: std-proposals@isocpp.org Original-Received: by 10.140.39.202 with SMTP id v68ls537048qgv.88.gmail; Wed, 05 Mar 2014 19:39:20 -0800 (PST) X-Received: by 10.140.107.138 with SMTP id h10mr205197qgf.2.1394077160218; Wed, 05 Mar 2014 19:39:20 -0800 (PST) X-Original-Sender: jgottman6@gmail.com Precedence: list Mailing-list: list std-proposals@isocpp.org; contact std-proposals+owners@isocpp.org List-ID: X-Google-Group-Id: 399137483710 List-Post: , List-Help: , List-Archive: List-Subscribe: , List-Unsubscribe: , Xref: news.gmane.org gmane.comp.lang.c++.isocpp.proposals:9636 Archived-At: ------=_Part_1292_7458619.1394077159725 Content-Type: text/plain; charset=UTF-8 The library fundamentals TR defines two new type trait template classes: invocation_type and raw_invocation_type. But it does not define the corresponding template aliases. Note that both of these classes define a member typedef type and no other public members, so according to the argument in N3887 the template aliases should be defined. Proposed Resolution: Add the following to section 3.3.2 of the Library Fundamentals specification: template using invocation_type_t = typename invocation_type::type; template using raw_invocation_type_t = typename raw_invocation_type::type; Joe Gottman -- --- You received this message because you are subscribed to the Google Groups "ISO C++ Standard - Future Proposals" group. To unsubscribe from this group and stop receiving emails from it, send an email to std-proposals+unsubscribe@isocpp.org. To post to this group, send email to std-proposals@isocpp.org. Visit this group at http://groups.google.com/a/isocpp.org/group/std-proposals/. ------=_Part_1292_7458619.1394077159725 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
The library fundamentals TR defines two new type trait tem= plate classes: invocation_type and raw_invocation_type.  But it does n= ot define the corresponding template aliases.  Note that both of these= classes define a member typedef type and no other public members, so accor= ding to the argument in N3887 the template aliases should be defined.
Proposed Resolution:

Add the following to section 3.3.2 of t= he Library Fundamentals specification:

template <class X> usin= g invocation_type_t =3D typename invocation_type<X>::type;

tem= plate<class X> using raw_invocation_type_t =3D typename raw_invocatio= n_type<X>::type;

Joe Gottman

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